The purpose of the present study was to examine the performance of a sample of 19 exceptional children on both the Stanford-Binet Intelligence Scale, Fourth Edition (Stanford-Binet IV) and the WISC-R. Construct validity studies of the Stanford-Binet IV with the WISC-R have yielded results which provide only partial support for predictions derived from the theoretical model underlying this new measure. The results obtained for the naturally occurring sample of exceptional children indicate nonsignificant differences in performance between Stanford-Binet IV and WISC-R Full Scale IQ. As with prior studies, results provide only partial support for the predictions derived from the theoretical model. Explanatory hypotheses for the observed discrepancies are discussed.